Related Questions
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Which of the following methods is used to determine the atomic weight?
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The Van der Waal's equation explains the behaviour of
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Four 1 litre flasks are separately filled with hydrogen, helium, oxygen and ozone gases at the same temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be
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4
In a closed packed structure the pattern ABAB...... represents which one of the following:
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4
The number of atoms per unit cell in bcc arrangement is
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4
When there is more deviation in the behaviour of a gas from ideal gas equation PV = nRT
A. at high temperature and low pressure
B. at low temperature and high pressure
C. at high temperature and high pressure
D. at low temperature and low pressure
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4
The best electrical conductor of the following is
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The pressure of the ideal gas is less than the real gas because of the
A. increase in the number of collisions
B. volume occupied by the molecules
C. inter-molecular attraction
D. finite size of molecules
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The number of atoms per unit cell in simple cubic, face centred cubic and body centred cubic arrangement are, respectively
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Volume occupied by 1 gm equivalent of oxygen at NTP is
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Number of molecules of carbon dioxide present in 44 gm is
A. 12 x approximately
B. 3 x approximately
C. 6 x approximately
D. 3 x approximately
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4
A chalk box exhibits
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Sodium chloride has fee structure. How many and ions are there in the unit cell?.
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In a solid atoms A are arranged in ccp array. Atoms B occupy all the octahedral voids and half the tetrahedral voids. The formula of the compound is expected to be
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How many nearest neighbours are there in an atom or ion in an octahedral hole of a close packed structure?
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A gas or vapour may be liquefied only at a temperature at or
A. below the critical temperature
B. above the critical temperature
C. above the normal boiling point
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The vapour density of a gas is 11.2. The volume occupied by 2.4 g of the gas at S.T.P wil be
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Vapour density of a gas is 35.5. The volume occupied by 3.55 gm of the gas at NTPis
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Density of a gas relative to air is 2.3. If the average molar mass of air is 29.08/mol, the molecular mass of the gas will be
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4
The vapour density of completely dissociated sociated would be
A. Determined by the amount of solid used in the experiment
B. Triple to that of
D. Slightly less than half of that of
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In a face centred cubic arrangement of ions, the coordination number of ions is
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The number of atoms in 0.004 gm of magnesium is close to
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Correct gas equation is
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In which one of the following does diffusion occur most rapidly?
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The vapour density of ozone would be
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The space occupied by spheres in ccp arrangement is
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Match box has the symmetry of which of the following systems?
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The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends upon the
B. temperature of the gas
D. pressure, temperature and volume of the gas
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An open vessel at 37°C is heated until 3/5 of the air in it has been expelled. Assuming that the volume of the vessel remains constant the temperature to which the vessel is heated is
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How many moles of water are present in 180 gm. of water ?